gsub a string in javascript

Question

I try to get only the domain name i.e. google.com from javascript

document.location.hostname

This code returns www.google.com.

How can I only get google.com? In this case it would be to either remove the www. or get only the domain name (if there's such a method in javascript).

Answer 1

var host = location.hostname.replace( /www\./g, '' );

The 'g' flag is for 'global', which is needed if you want a true "gsub" (all matches replaced, not just the first).

Better, though, would be to get the full TLD:

var tld = location.hostname.replace( /^(.+\.)?(\w+\.\w+)$/, '$2' );

This will handle domains like foo.bar.jim.jam.com and give you just jam.com.

Answer 2

... I'm in chrome right now, and window.location.host does the trick.

EDIT

So I'm an idiot... BUT hopefully this will redeem:

An alternate to regex:

var host = window.location.hostname.split('.')
    .filter(
        function(el, i, array){
            return (i >= array.length - 2)
        }
    )
    .join('.');